Tamping-machine.



0. NOLAN.

TAMPING MACHINE.

APPLICATION FILED JUNE 23, 1911.

Patented Feb. 18, 1913.

2 SHEETS-SHEET l Invenir 0L Lver n clan,

0. NOLQN.

TAMPING MACHINE.

APPLICATION FILED JUNE 23, 1911.

1,053,21 1. Patented Feb. 18, 1913.

2 SHBETS-SHEET Z.

liq/0011116? Oliver Hold/n1 UNITED STATES PATENT OFFICE.

OLIVER NOLAN, OF ST. PAUL, MINNESOTA, ASSIGNOB TO AUTOMATIC CONCRETE MACHINERY COMPANY, OF ST. PAUL, MINNESOTA, A CORPORATION OF MINNE- SOTA.

TAMPING-MACHINE.

' To all whom it may concern: Be it known that I, OLIVER NOLAN, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of S Minnesta,.have invented new and useful Improvements in Tamping- Machines, of which the following is a specification.

My invention relates to improvementsin tamping machines. Its object is to provide 0 a simple and inexpensive device of this class, adapted to tamp the contents of molds or forms of varying designs and sizes.

A further object is to provide such a device with a plurality of tamping bars or plungers arranged to be lifted, one at a time. By this arrangement, I secure econom in driving owr and also make it possib e to utilize the tamping bars, either singly or collectively, ona given piece of work;

0 A further object is to adapt the tamping bars orplungers to varying classes and stages of work by providin a downward stroke without fixed or pos1tive limit, the pur ose being to obviate defects in existing 5 mac ines due to a fixed or inconveniently adjustable stroke. In other words, the tamping bars of my machine adjust themselves to deep or shallow molds and to mclds containing little or much concrete or other 0 material.

In the drawings, Figure 1 is a front elevation of my improved tamping machine. Fig. 2 is a sectional view taken on the line 2-2 of Fig. 1, and Fig. 3 is a detail view 15 showing one of the spring arms and its opcrating bar.

Refernng to the accompanying drawing,

the numeral indicates the frame of mymachine'. A plurality of angle irons 11 are 10 arranged transversely on the frame to form ides for the tampin'g bars or plungers 12.l

guide rod 13 ower end of" said rod 13. The sockets or heads 14 are l :adapted to receive tamping blocks 15 and 16 of varying forms as illustrated in Fig. 1 of the drawings and are provided with set,

id tam ing bars include a .and a soc et or head 14 on the screws 17 to lock said tamping blocks in position. A platform 18 is constructed on the.

lower part of frame 10 to support molds or forms adapted to contain the material to be operated upon below the plungers 12. These P ungers are arranged to fall b gravity and compress and form materia s in the.

molds by the momentum of their fall.

Specification of Letters Patent.

Application filed June 23, 1911.

Patented Feb. 18, 1913.

Serial 10. 635,044.

nism for raising and releasin" the"v 11in e w 12: The drive shaft 19 is m ounte hi fli: frame 10 and driven by the'pulley 20. The arms 21 are loosely mounted on the shaft 19 and support the dogs 22 which are pivotally connected thereto. Said dogs are provided with weighted arms 23 and are connected to the plungers "12 by chains 24 which pass Over the guide sprockets 25. The trip mm 26 at: fixed on the drive shaft 19 by means of the set screws 271md are designed to engage the dogs 22 to raise the plunger-s 12. This atrangement of the trip army-26 0111116 Shdfi 19 causes the plunges to be raised one at-a time, the positions of said arms beingfixed to cause the action of the plungerspeither consecutivelv'or alternatelv as desired. The dogs 22 are held in the path. of the trip arms 26 when the plungers are down as shown in Fig. 2, and are engaged by said arms as-they revolve. When the arms -21 reach the p ol tion shown in dotted lines in Fig.2, as indicated by the numeral-28. the dogs are moved on their pivots by the chains 24 to;

tion:-

I employ the following described out of the path of the trip arms 2.; Iii-1&1 in" this phase of operation. are released from engagement with said arms. The plnng'ers,

12 are now free. and fal ing return the arms 21 to their original positions and thus bring; the do s 22 again into the path of the arms 26. The drive shaft 19 "revolves .continuouslv and the several plungers areili'fteireleased and fall, during each revolufilm of their respective trip arms;

While I have shown sprockets t's-guides for the chains 24 it is obvious thatzgrooved pulleys might be substituted for the same without departing from the spiritof inven tion.

It is often desirable to stop the action of one or more of the plungers and to ace complish this result, I have provided the following described mechanism: The spring arms 29 are mounted on one of the angle irons 11 and normally extend in positions adjacent to the plungers 12. The beveled lugs 30 on the plungers 12 are adaptedto displace the spring arms 29 on their upper stroke and engage the same on their downward stroke to stop the plungers and hold them in an elevated position. The operating bar 31, slidably mounted on the frame 10, is connected to the hand-operated lever 32 and, is adapted to adjust the spring arms 29. One position of the lever 32 permits the normal adjustment of the arms 29 to engage the lugs'30 as above described,-

while the second position of said lever holds the arms 29 out of the paths of said lugs 30 to permit the operation of the plungers 12; I have arranged a sprlng actuated dog 33 on one of the anglerironsll .for each.

spring arm 29, When itf is desirable to cause the operation of a-particular plunger or plungers, the; lever 32 is first; moved to a position throwing all, of the plungers out of operation the proper arm pertaining to lines and indicated by the numeral 34 in Fig; 2 ofthe drawings. When the do s 22 .terial to be moldedis placed in the form.-

Thelever, 32 is their moved to a position -ters Patent, s:

tween said arms and tamping are this. position, they are out o the paths of the triparms 26 and are not engaged'by said arms 7;, p

-n operation, a former mold is placed on the platform 18 a'ndf-asupply of mapermitting the operation of an or all of the plungers asdesired. The ogs 22 are -moved intothe paths of the, trip arms 26 asthe plun ers fall, and are engaged, raised and release by said arms at each rotation of thesame, thus permitting the appropriate plungers to fall by gravity and compress the material in the form or mold, As the operation continues, additional material is added, until the mold is filled and tamped. The lever 32 is then moved back to its original position to discontinue the action of the plungers 12.

Having described myinvention, what I claim as new and desire to protect by Let- 1. In a tamping machine, a frame, a series of vertically mounted tamping bars in said frame, drive shaft, arms rotatably mounted on said shaft, connecting means between said arms and tamping bars, and trip arms fixed to and adjustable on the shaft adapted to engage said means for raising the tamping-bars.

2. In a tamping machine, a frame, a series of vertically mounted tamping bars on said frame, a drive shaft, arms rotatably mounted on shaft, flexible connectin means hears, guides for said means, and trip arms fixed to and adjustable on the shaft and adapted to engage said means for raising the tamping ars.

3. In a tamping machine, a frame, a series of vertically mounted tamping bars on'said frame, a drive shaft, arms rotatably moun-/ ed on said shaft dogs on said arms, chainsconnecting said dogs and tamping bars, and trip arms' fixed to said shaft and adapted Bo engage said dogs for raising the tamping MS.

4. In a tamping machine, a frame, a series of vertically mounted tamping bars on said frame, a drive shaft, arms rotatably mounted on said shaft, connecting means between said arms and tamping bars, trip arms fixed to and adjustableon the shaft and adapted to engage said means for raising the tamping bars, "and means for engaging and disengaging the tamping bars either singly or collectively to throw the same in and out of operation. a

5. In a tamping machine, a frame, a series of vertically extended tamping bars mounted on said frame, a drive shaft, arms rotatably mounted on said shaft, dogs on saidarms, chains connecting said dogs and tamping bars, triip arms on said shaft adapted to engage sai dogs to raise the tamping I bars, lugs on the tamping bars, and spring arms on the frame adapted to normally rest in the paths of said lugs to engage and hold sald tamping bars in an elevated position. I t

6; In a tamping machine, a frame, a

series of vertically extended tamping bars mounted on said frame, a drive shaft, arms rotatably mounted on said shaft, dogs on said arms, chains connecting said dogs and tampin bars, trip arms, on said shaft adapte to engage said dogs to raise the tamping bars, lugs on the tamping bars,

sprlng arms on the frame ada ted to normally rest in the paths of sai lugs to engage and hold said tamping barsin an elevated position, and an operating bar for shifting the spring arms from the pathsfof said lugs.

7. In a tamping machine, a frame, a series of vertically extended tamping bars mount ed on said frame, a drive shaft, arms rotatably mounted on said shaft, dogs on said arms, chains connecting said dogs and tamping bars, trip arms on said shaft, adapted to engage said dogs to raise the tamping bars, lugs on the tamping bars, spring arms on the frame adapted to nor mally rest in the aths of said lugs to engageand hold said tamping bars in an elevated position, an operating bar for shiftih' said arms from the paths of said lugs, an. a hand operated lever for moving and looking said bar.

8. In a tamping machine,- a frame, a series of vertically extended tamping bars. mounted on said frame, a drive shaft, arms rotatably mounted on said shaft, dogs on said arms, chains connecting said dogs and tamping bars, trip arms on said shaft adapted to engage said dogs to raise the tamping bars, lugs on the tamping bars, spring arms on the frame adapted to n0rmally rest in the paths of said lugs to engage and hold said tamping bars in an elevated position, and dogs for engaging the spring arms to permanently lock and hold the same from the paths of the lugs.

9. In a tamping machine, a frame, a plurality of vertical tamping bars on the frame, a drive shaft, arms rotatably mounted on said shaft, dogs on said arms, flexible connecting means, having guides, between said dogs and tamping bars, and trip arms on the drive shaft for engaging the dogs to raise the tamping bars.

10. In a tamping machine, a frame, a plurality of vertical tamping bars on the frame, a drive shaft, arms rotatably mounted on said shaft, dogs on said arms, flexible connecting means between said do s and tamping bars, and angularly adjusta 1e trip arms on the drive shaft for engaging the dogs to raise the tamping bars.

In testimony whereof, I have signed my name to this specification in the presence 25 of two subscrib ng witnesses.

OLIVER NOLAN. Witnesses:

JOHN E. STRYKER, "FRED. C. CABWELL. 

